External Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, Metric, SAE
3/16 ", 15 mm, 1/4 ", 5/16 ", 11/16 "
38.1, 19.05, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide